Intermediate and felsic magmas usually arise where
A) mafic magma mixes with felsic material.
B) volcanoes lie on continental margins inland of subduction zones.
C) plates diverge as spreading ridges form.
D) volcanoes lie above transform faults.
E) A and B
Correct Answer:
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Q19: Which of the following statements most accurately
Q20: An extinct volcano is one which
A) existed
Q21: Aa lava is different from pahoehoe lava
Q22: The type of volcano that forms over
Q23: Composite volcanoes form from
A) intermediate or andesitic
Q25: Volcanism occurs along which of the following?
Q26: Magmas with mafic compositions would most likely
Q27: One common and dangerous gas emitted from
Q28: Basalt lava when chilled rapidly beneath water
Q29: Pahoehoe is a lava ejected by Hawaiian
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